visibility: Window.FullScreen crashes XR application

<Issue>
Using visibility: Window.FullScreen in QML crashes the application on the device.

<Environment>

• Qt 6.8.0
• Windows 11 Host
• Meta Quest 3 Device

<Reproduction Step>

1. Get the minimal reproduction project. 
   https://git.qt.io/mikio_hirai/window_fullscreen_xr_crash#
2. Build and run it on Meta Quest3 with Android Qt 6.8.0 Clang arm64-v8a kit.
3. The application crashes. You can see it in the "Application Output" in Qt Creator.

<Comment>
Maybe this is meant to be. But I'd say some people may stuck with this issue because there is no error message which suggests visibility: Window.FullScreen is the issue or documentation about it.

I haven't tested this with Meta XR Simulator and Apple Vision Pro.